Benefit Plans - Components of Net Periodic Pension (Benefit) Cost (Detail) - USD ($) $ in Thousands	3 Months Ended
	Feb. 28, 2017	Feb. 29, 2016
U.S Pension Plan [Member]
Components of net periodic pension cost (income):
Service cost	$ 112	$ 100
Interest cost on projected benefit obligation	564	587
Expected return on plan assets	(767)	(776)
Net amortization	1	0
Net periodic pension income	(90)	(89)
German Pension Plan [Member]
Components of net periodic pension cost (income):
Interest cost on projected benefit obligation	100	130
Net amortization	84	80
Net periodic pension income	$ 184	$ 210